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Type: Artigo de Periódico
Title: Characterisation of an ABC transporter of a resistant Candida glabrata clinical isolate
Author: Rocha, Debora Afonso Silva
Sa, Leandro Figueira Reis de
Pinto, Ana Carolina Cartagenes
Junqueira, Maria de Lourdes
Silva, Emiliana Mandarano da
Borges, Ronaldo Mohana
Ferreira-Pereira, Antonio
Resumo: -
Abstract: BACKGROUND Candida glabrata ranks second in epidemiological surveillance studies, and is considered one of the main human yeast pathogens. Treatment of Candida infections represents a contemporary public health problem due to the limited availability of an antifungal arsenal, toxicity effects and increasing cases of resistance. C. glabrata presents intrinsic fluconazole resistance and is a significant concern in clinical practice and in hospital environments. OBJECTIVE The aim of this study was to characterise the azole resistance mechanism presented by a C. glabrata clinical isolate from a Brazilian university hospital. METHODS Azole susceptibility assays, chemosensitisation, flow cytometry and mass spectrometry were performed. FINDINGS Our study demonstrated extremely high resistance to all azoles tested: fluconazole, voriconazole, posaconazole and itraconazole. This isolate was chemosensitised by FK506, a classical inhibitor of ABC transporters related to azole resistance, and Rhodamine 6G extrusion was observed. A mass spectrometry assay confirmed the ABC protein identification suggesting the probable role of efflux pumps in this resistance phenotype. MAIN CONCLUSIONS This study emphasizes the importance of ABC proteins and their relation to the resistance mechanism in hospital environments and they may be an important target for the development of compounds able to unsettle drug extrusion.
Keywords: Candida glabrata
ABC transporters
CNPq: -
Language: eng
Country: Brasil
Publisher: -
Institution Initials: -
Access Type: Acesso Aberto
Issue Date: Feb-2018
Appears in Collections:Artigos de Periódicos

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